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Help needed to calculate the resistance of a ship's hull

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Old   April 27, 2012, 07:28
Default Help needed to calculate the resistance of a ship's hull
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vinayak m a k
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Dear all,
This is my first post in this forum though I have been following it for some time

I have a hull surface in .igs format and want to calculate resistance of the hull for a speed of 20 knots. If anyone done similar project using cfx, kindly help me in this regard, as I am unable to find any tutorial specific for ship resistance ( or total drag force)

vmak..
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Old   May 7, 2013, 10:39
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mohammad
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hi dear vmak
I have got a project as like as you and I have got only cfx toturial to help me.If you have any question i will help u if i can
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Old   May 12, 2013, 17:42
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Hi guys.

I have also the same questions. In my case for a boat at 40 knots. Where to find a tutorial about this? Is it CFX capable to do it? Maybe Aqwa should be used?

something like this would be nice
http://www.youtube.com/watch?v=AXjTUaqxjPM
and something like this, GREAT !

http://www.youtube.com/watch?v=stSxJ4qsSWI


Thank´s
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Old   May 12, 2013, 19:15
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Glenn Horrocks
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Sure, CFX can do those simulations - but do not underestimate the difficulty of it. I hope you have a supercomputer available to run it. Or are you expecting to run it on your desktop

CFX has strengths in resistance of things like yachts where the turb transition model comes in handy. But if you are talking about vessels like power boats then I do not think CFX is the best choice of code. It can do it but it is difficult to get working right and slow. You might find Fluent faster, and I suspect other software is available specifically designed for these sort of calulations.

For instance Gerris has an impressive list of naval simulations in its examples: http://gfs.sourceforge.net/wiki/index.php/Main_Page

But it does not have a turbulence model so can really only model wave resistance in your application.
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